Facsimile communication method and facsimile machine

ABSTRACT

In a facsimile communication method for transmitting facsimile data to a reception terminal from a facsimile machine via a communication network, a transmission process in the facsimile machine includes the following steps: (a) a step of saving image data of an original to be transmitted as facsimile data in a storage; (b) a step of generating access information data for access to the image data, saved in the storage, from the reception terminal via the transmission network; (c) a step of sending the access information data to the reception terminal by an e-mail; and (d) a step of transmitting the image data in the storage to the reception terminal from the facsimile machine by a communication protocol of a point-to-point data transfer form upon reception of an access request for the image data from the reception terminal.

[0001] This is a continuation of U.S. Application No. 08/930,609, filed Oct. 14, 1997, which was the National Stage of International Application No. PCT/JP97/00694, filed Mar. 6, 1997, the contents of which are expressly incorporated by reference herein in their entireties. The International Application was not published in English.

TECHNICAL FIELD

[0002] The present invention relates to a data communication method for communicating data of a large size, such as a still picture, a moving picture and audio data, via a networks and, more particularly, to a facsimile communication method and a facsimile machine, which transmit image data like facsimile data using an e-mail system over a network.

BACKGROUND ART

[0003] Recently, for the efficiency of works in an office, an information processing apparatuses provided in the office are connected via a LAN (Local Area Network) installed in the office. A facsimile machine receives facsimile data which has been sent via a public telecommunication network from another facsimile machine. This facsimile machine converts the received facsimile data to an e-mail for a personal destination and transmits this e-mail to an information processing terminal on the LAN to which the facsimile machine is connected.

[0004] Unexamined Japanese Patent Publication No. Hei 6-164645 discloses a facsimile communication system which performs such facsimile communications.

[0005]FIG. 29 schematically illustrates the facsimile communication system disclosed in the Unexamined Japanese Patent Publication No. Hei 6-164645. A plurality of information processing terminals 182-1, 182-2 and 182-3 and a network connection type facsimile machine (NETFAX) 183 are connected to a LAN 181. The NETFAX 183 connects to an ISDN (Integrated Services Digital Network).

[0006] Another facsimile machine scans a transmission original to read the image data of the original. The image data read by this facsimile machine is sent to the information processing terminal 182-1 on the LAN via the ISDN 184. The facsimile machine transmits the image data via the ISDN 184 to the NETFAX 183 on the LAN with the telephone number of the NETFAX 183. At this time, the e-mail address of the information processing terminal 182-1 is set to a subaddress included in a number informing service provided by the ISDN and is transmitted simultaneously.

[0007] Upon reception of image data from the facsimile machine, the NETFAX 183 converts the received image data to the transmission format of an e-mail and sends it to the e-mail address of the information processing terminal 182-1 that has been input as the subaddress. In an existing e-mail system built on the LAN 181, an e-mail affixed with image data to be facsimiled is temporarily saved at a relay site or a reception site. That is, in the process of transmitting an e-mail (facsimile data including image data) to the information processing terminal 182-1 from the NETFAX 183, the e-mail including image data is temporarily saved at a relay site or a reception site on the network.

[0008] As facsimile data is image data read from a transmission original, however, it has a large data size. If facsimile data is color image data, the data size becomes larger. Facsimile data with a large data size has a problem of greatly using up the capacities of a relay site and a reception site.

[0009] In the case where the NETFAX 183 makes multi-casting of an e-mail of facsimile data to multiple information processing terminals on the network, the facsimile data which has a larger data size than an ordinary e-mail is transmitted to every site, there is a problem of increasing the traffic of the network.

DISCLOSURE OF INVENTION

[0010] It is therefore an object of the present invention to provide a facsimile communication method and a facsimile communication machine, which can significantly suppress an increase in the traffic on a network by transmitting facsimile data via a LAN, WAN, Internet or other networks, or which do not use up the memory resource at a relay site and a reception site for an e-mail.

[0011] A facsimile communication method according to this invention which transmits facsimile data to a reception terminal from a facsimile machine via a communication network, a transmission process in the facsimile machine including the following steps:

[0012] (a) a step of saving image data of an original to be transmitted as facsimile data in a storage;

[0013] (b) a step of generating access information data for access to the image data, saved in the storage, from the reception terminal via the communication network;

[0014] (c) a step of sending the access information data to the reception terminal by an e-mail; and

[0015] (d) a step of transmitting the image data in the storage to the reception terminal from the facsimile machine by a communication protocol of a point-to-point data transfer form upon reception of an access request for the image data from the reception terminal.

[0016] A facsimile machine according to this invention acquires an e-mail address of a reception terminal, destined for the facsimile data, and saves image data of an original to be transmitted as facsimile data in a storage. Access information data for access to the image data, saved in the storage, from the reception terminal via the communication network is generated, and the access information data is sent to the e-mail address of the reception terminal by an e-mail. Upon reception of an access request for the image data from the reception terminal, the image data in the storage is transmitted to the reception terminal by a communication protocol of a point-to-point data transfer form.

[0017] According to this invention, only access information data for image data registered in a storage in a network is sent to a reception terminal by an e-mail, and image data is not sent directly to a transmission destination. Even in the case where large image data is transmitted to multiple destinations, therefore, it is unnecessary to send the same data to multiple sites so that the mail spools of destination sites are not occupied.

[0018] According to a facsimile communication method embodying this invention, a transmission process in a facsimile machine includes the following steps:

[0019] (a) a step of saving image data of an original to be transmitted as facsimile data in a server located on a network;

[0020] (b) a step of generating access information data for access to the image data, saved in the server, from the reception terminal via the communication network; and

[0021] (c) a step of sending the access information data to the reception terminal by an e-mail.

[0022] Further, a process in the server includes the following steps:

[0023] (d) a step of saving the image data received from the facsimile machine; and

[0024] (e) a step of transmitting the image data to the reception terminal by a communication protocol of a point-to-point data transfer form upon reception of an access request for the image data from the reception terminal.

[0025] A facsimile machine according to this invention acquires an e-mail address of a reception terminal on the communication network, and registers image data of an original to be transmitted as facsimile data in a server located on the communication network. Access information data for access to the image data, registered in the server, from the reception terminal via the communication network is generated, and the access information data is sent by e-mail to the e-mail address of the reception terminal. The server receives an access request sent out from the reception terminal and transmits the image data to the reception terminal by a communication protocol of a point-to-point data transfer form.

[0026] According to this invention, since it is unnecessary to register image data in a facsimile machine, a large-capacity hard disk can be removed from the facsimile machine so that the structure can be simplified.

BRIEF DESCRIPTION OF DRAWINGS

[0027]FIG. 1 is a schematic diagram of a facsimile communication system according to the first embodiment;

[0028]FIG. 2 is a functional block diagram of a NETFAX according to the first embodiment;

[0029]FIG. 3 is a functional block diagram of a CPU in the NETFAX;

[0030]FIG. 4 is a flowchart of the first embodiment;

[0031]FIG. 5 is a diagram showing a network structure;

[0032]FIG. 6 is a structural diagram of image data turned into an HTML document;

[0033]FIG. 7 is a structural diagram of an e-mail for sending a URL;

[0034]FIG. 8 is a functional block diagram associated with a file deleting function according to the second embodiment;

[0035]FIG. 9 is a flowchart of the second embodiment;

[0036]FIG. 10 is a functional block diagram of a NETFAX according to the third embodiment;

[0037]FIG. 11 is a functional block diagram associated with a file deleting function according to the third embodiment;

[0038]FIG. 12 is a flowchart of the third embodiment;

[0039]FIG. 13 is a functional block diagram associated with a user authentication function according to the fourth embodiment;

[0040]FIG. 14 is a structural diagram of a password management table according to the fourth embodiment;

[0041]FIG. 15 is a flowchart of the fourth embodiment;

[0042]FIG. 16 is a functional block diagram associated with a user authentication function according to the fifth embodiment;

[0043]FIG. 17 is a structural diagram of an access confirmation column according to the fifth embodiment;

[0044]FIG. 18 is a flowchart of the fifth embodiment;

[0045]FIG. 19 is a functional block diagram associated with a transmission accomplishment informing function according to the sixth embodiment;

[0046]FIG. 20 is a flowchart of the sixth embodiment;

[0047]FIG. 21 is a schematic diagram of a facsimile communication system according to the seventh embodiment;

[0048]FIG. 22 is a functional block diagram of a NETFAX according to the seventh embodiment;

[0049]FIG. 23 is a diagram of a network structure;

[0050]FIG. 24 is a flowchart for image registration according to the seventh embodiment;

[0051]FIG. 25 is a flowchart for image registration according to the eighth embodiment;

[0052]FIG. 26 is a functional block diagram of an information processing terminal according to the ninth embodiment;

[0053]FIG. 27 is a flowchart of the ninth embodiment;

[0054]FIG. 28 is a functional block diagram when an information processing terminal is a NETFAX; and

[0055]FIG. 29 is a diagram exemplifying a conventional facsimile communication system.

BEST MODES FOR CARRYING OUT THE INVENTION

[0056] Embodiments of the present invention will now be described with reference to the drawings.

First Embodiment

[0057]FIG. 1 schematically illustrates a facsimile communication system according to the first embodiment. A network connection type facsimile machine (NETFAX) 1 sends facsimile data to a reception terminal 3 via a communication network 2. The NETFAX 1 has a WWW (World Wide Web) server mechanism inside.

[0058] The NETFAX 1 scans an original after accepting the e-mail address of the reception terminal 3. The image data of the scanned original is registered in a storage of the internal WWW server mechanism after being converted to the form which is externally accessible as an HTML (Hyper Text Markup Language) document. Meantime, a URL (Uniform,Resource Locator) for the reception terminal 3 to access the image data of the NETFAX 1 via the communication network 2 is transmitted by e-mail to the reception terminal 3.

[0059] When requiring acquisition of image data, the reception terminal 3 accesses the WWW server mechanism of the NETFAX 1 using the URL in the received e-mail and acquires the necessary image data in accordance with a point-to-point communication protocol.

[0060]FIG. 2 is a functional block diagram of the NETFAX 1. In the NETFAX 1, a CPU 11 is connected to a RAM 12, a ROM 13, an external storage 14, a panel section 15, a scanner section 16, a LAN controller 17 and a printer section 18 via an internal bus. The NETFAX 1 is connectable to a public telecommunication network, though not illustrated, so that it can transmit and receive facsimile data.

[0061] The CPU 11 manages the general operation of the facsimile machine and operates with respect to the transmission of image data in accordance with the flowchart illustrated in FIG. 4. A program which controls the operation of the CPU 11 is stored in the ROM 12. The RAM 13 is used as a work area for data processing associated with transmission and reception processes for image data. The external storage 14 is a secondary memory device which is typified by a hard disk, and is used to save image data which is sent as facsimile data. The panel section 15 is an operation panel through which alphabets, numerals and symbols can be input, and permits an operator to input an e-mail address and a telephone number, etc. The scanner section 16 scans a transmission original to convert it to image data. The LAN controller 17 is an interface between the NETFAX 1 and the network 2, and transmits and receives data via the network. The printer section 18 prints out image data received via the public telecommunication network or network.

[0062]FIG. 3 shows the structure of the functional blocks of the CPU 11. A data compressor 21 compresses the image data of a transmission original, scanned by the scanner section 16, or image data included in facsimile data received via the public telecommunication network, in the format of JPEG, TIFF or the like. An HTML document generator 22 converts compressed image data to an HTML document, affixes a file name thereto and saves it in the external storage 14. The file name and directory of the image data saved in the external storage 14 are given to a URL generator 23. The URL generator 23-generates a URL which consists of elements, such as a protocol for accessing image data saved in the external storage 14, a server name (NETFAX 1) on the Internet where image data to be transmitted as image data is located, and the directory and file name in the external storage 14 which is storing image data. An e-mail generator 24 receives an e-mail address of a transmission destination which is input through the panel section 15, or an e-mail address of a transmission destination specified by the subaddress of an ISDN line which has sent facsimile data. Then, the URL is transmitted to the e-mail address of the transmission destination to inform facsimile transmission. Meanwhile, a WWW server mechanism 25 equipped in the NETFAX 1 knows that the reception terminal 3 intends to access image data in the external storage using the URL. The WWW server mechanism 25 acquires image data from the external storage 14 in response to an access request received from the reception terminal 3, and directly sends it to the reception terminal 3 in accordance with the HTTP.

[0063] The operation of the thus constituted facsimile communication system will be described.

[0064]FIG. 4 is a flowchart for the transmission process of the NETFAX 1. As shown in FIG. 5, the NETFAX 1 is located within the network of a LAN 26, and can connect to an Internet 28 via a router 27. Meanwhile, the Internet 28 can reach another LAN 30 via a router 29. Connected within the network of the LAN 30 are a plurality of information processing terminals (including a facsimile) one of which becomes the reception terminal 3 that is the transmission destination of image data.

[0065] A description will be given of the case where the NETFAX 1 in the LAN 26 transmits image data via the Internet 28 to the reception terminal 3 in another LAN 30. First, the e-mail address of the transmission destination or the reception terminal 3 on the network, which has been input through the panel section 15 by an operator, is input (St 1). Next, the scanner section 16 scans a transmission original and converts it to image data (St 2). The image data of the transmission original with a file name affixed thereto is saved in the external storage 14 (hard disk) (St 3).

[0066] In the process from the scanning of the transmission original by the scanner section 16 to saving in the external storage 14, compression of image data and structuring of an HTML document are performed. As shown in FIG. 6, for example, image data is encoded in the TIFF format and this image data is structured into an HTML document. An HTML document can be accessed via a network by the point-to-point HTTP (Hyper Text Transfer Protocol).

[0067] An URL for access to image data registered in the external storage 14 is generated. As shown in FIG. 7, an e-mail is prepared in which the URL for access to image data registered in the external storage 14 is written in the text of the e-mail. This e-mail is transmitted to the reception terminal 3 using the SMTP (Simple Mail Transfer Protocol) (St 4).

[0068] The WWW server mechanism 25 receives a request for image data of the NETFAX 1 from the reception terminal 3. The WWW server mechanism 25 acquires image data (facsimile data) with the requested file name from the external storage 14, and transfers it to the IP address of the requesting reception terminal 3 using the HTTP.

[0069] When the NETFAX 1 relays the facsimile data received over the public telecommunication network to the reception terminal 2 on the network, image data is acquired from the facsimile data received through the public telecommunication network and is converted to an HTML document. This HTML document is saved in the external storage 14, and a URL for access to image data (HTML document) in the external storage 14 is transmitted by e-mail to the reception terminal 3.

[0070] According to the first embodiment, as apparent from the above, image data is saved in the external storage 14 in the form of an HTML document, only the access information data (URL) of the image data is sent by e-mail to the e-mail address of the transmission destination, and the reception terminal 3 accesses and acquires the image data of the NETFAX 1 by the HTTP, so that facsimile data (including image data) can be transferred to the reception terminal without going through a relay site and a reception site. This can prevent large image data from using up the capacity of the relay site and reception Site.

Second Embodiment

[0071]FIG. 8 shows a functional block diagram associated with a function of deleting image data, which becomes unnecessary, from the storage. The fundamental system structure is the same as that of the first embodiment, except for the function of deleting image data from the storage.

[0072] When there is access to image data saved in the external storage 14, the WWW server mechanism 25 leaves a log for the accessed file. An access detector 31 searches the log from the external storage 14 to identify the accessed image data.

[0073] A file deleting function 32 receives the directory and file name of image data, which has been externally accessed, from the access detector 31 and deletes this image data from the external storage 14.

[0074]FIG. 9 shows a flowchart associated with facsimile data transmitting and deleting processes in the NETFAX 1. The processes (St 11 to St 14) from the identification of the e-mail address of the transmission destination, input through the panel section 15 by an operator, to the transmission of the image data of a transmission original to the e-mail address of the transmission destination are the same as those of the first embodiment. Specifically, after the e-mail address of the transmission destination is identified (St 11), the transmission original is scanned by the scanner section 16 (St 12), the image data scanned by the scanner section 6 is registered in the external storage 14 (St 13), and the URL of the image data registered in the external storage 14 is transmitted to the e-mail address of the transmission destination (St 14).

[0075] The access detector 32 searches the log, left in the external storage 14 by the WWW server mechanism 25, to monitor whether or not access to the image data registered in the external storage 14 has been made from outside (St 15). The file deleting function 32 which has been informed of the file name, etc. of the externally accessed image data deletes this image data from the external storage 14 (St 16).

[0076] Since the accessed image data is deleted from the external storage 14 after detecting that the facsimile data (image data) saved in the external storage 14 has been accessed from outside as apparent from the above, it is possible to prevent image data which has become unnecessary from remaining in the external storage 14 for a long time, thus ensuring the efficient use of the area of a hard disk.

Third Embodiment

[0077]FIG. 10 shows the functional blocks of a NETFAX according to the third embodiment. The basic system structure is the same as those of the first and second embodiments. The NETFAX is provided with a timer section 19 for measuring the time that has elapsed since the registration of image data in the external storage 14.

[0078]FIG. 11 depicts the functional blocks of the portion that is associated with a function of deleting image data. A time-exceeded file detector 33 manages an accessible time input through the panel section 15 by an operator. As the time-exceeded file detector 33 informs the file deleting function 32 of the file name of the image data whose accessible time has been exceeded, the file deleting function 32 deletes the image data from the external storage 14.

[0079]FIG. 12 illustrates a flowchart about image data transmitting and deleting processes in the NETFAX. The time in which the e-mail address of the transmission destination, input through the panel section 15 by the operator, and image data to be transmitted are held in the external storage 14 are identified (St 21).

[0080] As in the first embodiment, the transmission original is scanned by the scanner section 16 (St 22), the image data scanned by the scanner section 16 is registered in the external storage 14 (St 23), and the URL of the image data registered in the external storage 14 is transmitted to the e-mail address of the transmission destination (St 24).

[0081] The time-exceeded file detector 33 compares the time elapsed since the registration of the image data saved in the external storage 14 with the accessible time for this image data (St 25). When there is a file of image data with the elapsed time exceeding the accessible time, the file deleting function 32 is informed of its file name and it is deleted from the external storage 14 (St 26).

[0082] Because the accessible time of image data registered in the external storage is managed and the image data whose accessible time is reached is deleted, it is possible to prevent image data which has become unnecessary from remaining in the external storage 14 for a long time and occupying the area in a hard disk.

Fourth Embodiment

[0083]FIG. 13 shows the functional blocks of a function of authenticating a user who has requested access to image data and a file deleting function of the NETFAX. The NETFAX is equipped with a user authentication mechanism 41 which authenticates a user who has requested access to image data. The user authentication mechanism 41 refers to a password management table 42 to discriminate if the access request has come from a person who wanted to transmit image data.

[0084]FIG. 14 shows the structure of the password management table 42. Set in the password management table 42 are address information of users of transmission destinations, the names of files where image data are saved, and passwords. The informing e-mail generator 24 inserts a password in an e-mail in addition to a URL. The password may be the one input through the panel section 15 by an operator or the one which is mechanically assigned by the informing e-mail generator 24.

[0085]FIG. 15 presents a flowchart from the input of the e-mail address of a transmission destination to the deletion of transmitted image data. As in the first embodiment, the e-mail address of the transmission destination input through the panel section 15 by the operator is identified (St 31), the transmission original is scanned by the scanner section 16 (St 32), and the image data scanned by the scanner section 16 is registered in the external storage 14 (St 33).

[0086] A password is added to an e-mail by which a URL for accessing image data registered in the external storage 14 is to be transmitted, and the e-mail is sent to the e-mail address of the transmission destination (St 34).

[0087] At the time of accessing image data using the URL affixed to the e-mail, the reception terminal 3 also sends the password affixed to that URL.

[0088] When detecting an access request from a data stream from the LAN 25 (St 35), the user authentication mechanism 41 acquires the password of the user, who has made an access request, from the password management table 42 for authentication (St 36). When the passwords match with each other, the user having made the access request is permitted to access (St 37). As a result, the WWW server mechanism 25 transmits the image data (HTML document) in the external storage 14 to the user having made the access request in accordance with the HTTP (St 38). The image data which has been accessed externally is deleted from the external storage 14 by the file deleting function 32 (St 39).

[0089] As apparent from the above, the provision of the mechanism which authenticates the user who has made an access request can permit image data to be sent only to a specific person by the WWW server which is used by unspecified individuals.

[0090] As the names of files to be transmitted can be registered in the password management table 42 as shown in FIG. 14, it is possible to authenticate users who have made access requests file by file.

Fifth Embodiment

[0091]FIG. 16 depicts the functional blocks associated with an access confirming function and a user authentication function of the NETFAX. An access confirmation column 44 is affixed to image data, which should be transmitted to multiple destinations and is saved in the external storage 14. FIG. 17 shows the structure of the access confirmation column 44. An access detector 43 searches the log the WWW server mechanism 25 leaves with respect to the accessed file, and, upon detection of a destination for multi-casting, checks the associated portion in the access confirmation column 44. When all the destinations for multi-casting, registered in the access confirmation column 44, are checked, its image data is deleted.

[0092]FIG. 18 is a flowchart from the input of an e-mail address to the deletion of data after checking access.

[0093] First, when the e-mail address of the transmission destination is input (St 41), the original is scanned to be converted to image data (St 42). Next, the access confirmation column 44 is affixed to the image data acquired through scanning and is registered in the external storage 14 (St 43). When multi-casting is specified, the access confirmation column 44 where destinations for multi-casting associated with the e-mail addresses of the destinations for multi-casting have been registered is affixed to the image data. This is accomplished by the HTML description.

[0094] When there is access to image data thereafter (St 44), the same authentication as done in the fourth embodiment is carried out (St 45, St 46). If the access request has come from a destination for multi-casting, the WWW server mechanism 25 transmits image data according to the HTTP. When the access detector 43 checks the log and identifies the transmission destination which has accessed the image data, it sets a flag indicating the access event in the associated portion in the access confirmation column 44 (St 47).

[0095] At the time the access confirmation column 44 is thoroughly checked (St 48), it is understood that all the destinations for multi-casting could have accessed the image data, so that this image data is deleted then (St 49).

[0096] Since the access confirmation column 44 having destinations for multi-casting registered therein is affixed to image data and saved, it is determined that every destination for multi-casting has confirmed the data upon detection of the access confirmation column 44 being thoroughly checked, and the data is then deleted, it is possible to prevent data from being stored unnecessarily and also prevent the data from being deleted without being sent to predetermined persons.

Sixth Embodiment

[0097]FIG. 19 presents a functional block diagram for the NETFAX to inform other information processing terminals on a network of the accomplishment of transmission of image data.

[0098] As in the fifth embodiment, the access confirmation column 44 is affixed to image data to be saved in the external storage 14, and the access detector 45 checks the access confirmation column 44 and recognizes that all the destinations for multi-casting have accessed.

[0099] Further, the address information of information processing terminals which are to be informed of the accomplishment of transmission by a transmission accomplishment informing function 51. The address information may be input through the panel section 15 by an operator or may be informed by a transmission scheme such as an e-mail. When informed of access being made by all the destinations for multi-casting from the access detector 45, the transmission accomplishment informing function 51 makes acknowledgement to that effect to the addresses of the information processing terminals at the destinations for multi-casting.

[0100]FIG. 20 is a flowchart which includes a process of informing the accomplishment of transmission.

[0101] The e-mail addresses of the transmission destinations are input and the e-mail addresses on the network of the information processing terminals which are to be informed of the accomplishment of transmission are input too (St 50). The e-mail addresses at which the accomplishment of transmission should be informed are given to the transmission accomplishment informing function 51.

[0102] The scanner section 16 scans the original (St 51) and registers its image data in the external storage 14 (St 52). At the time every transmission destination having accessed the image data in the external storage 14 is confirmed (St 53 to St 57), the access detector 45 reports such to the file deleting function 32 and the transmission accomplishment informing function 51.

[0103] Consequently, the file deleting function 32 deletes the image data from the external storage 14 (St 58), and the transmission accomplishment informing function 51 sends an e-mail indicative of the completion of transmission at the e-mail addresses to be informed (St 59).

[0104] Because the terminals which are requesting the acknowledgement of the accomplishment of transmission are informed of the accomplishment of transmission when the transmission of image data is completed, it is possible to know the sure transmission of data to where it should be sent at the place where the data has been registered.

[0105] Although the transmission accomplishment informing function is informed of the accomplishment of transmission on the condition that access has been acknowledged according to the sixth embodiment, modifications designed to inform the transmission accomplishment informing function of the accomplishment of transmission after reception of image reception information data indicating the reception of image data from the reception terminal 3 will be described individually. Programming should be designed in such a way that simple clicking of the reception confirmation screen affixed to image data at the reception terminal 3 allows access to the NETFAX 1 to inform the image reception information data.

[0106] In the NETFAX 1, the image reception information data which is sent back via the network from the reception terminal that has received the image data and access information data for access by the reception terminal 3 at the time of sending this image reception information data back to the NETFAX 1 are affixed to the image data saved in the external storage 14. When there is an access request from the reception terminal 3, data including the image reception information data and access information data is affixed to the image data and is transmitted together.

[0107] At the reception terminal 3, the reception confirmation screen shown at the end of the image data is clicked. When the reception confirmation screen is clicked, the image reception information data is transmitted to the NETFAX 1 based on the access information data that has been linked to this screen.

[0108] The NETFAX 1 recognizes the reception of the image data at the reception terminal 3 by identifying the image reception information data sent back from the reception terminal 3, and sends an e-mail whose content indicates the accomplishment of transmission to the e-mail address of the acknowledgment requesting device.

Seventh Embodiment

[0109]FIG. 21 is a system structural diagram of a facsimile communication system which has a server for image data located on a network.

[0110] In the above-described first to sixth embodiments, image data to be transmitted is registered in the external storage 14 equipped in the NETFAX 1 and the NETFAX 1 itself serves as a WWW server.

[0111] According to this seventh embodiment, the NETFAX does not itself have a function as a server, and an image is registered in a server which is operating on another host on a network, thereby accomplishing the same function of each embodiment discussed above.

[0112] A NETFAX 60 comprises the data compressor 21, the HTML document generator 22, the URL generator 23 and the informing e-mail generator 24, which are included in the functional blocks of the NETFAX 1 illustrated in FIG. 3. Further provided is a function of registering an HTML document of image data, generated by the HTML document generator 22, in a WWW server 61 on the network 2. The URL generator 23 generates a URL for access to the image data in the WWW server 61.

[0113]FIG. 22 shows the functional blocks of the NETFAX 60. As shown in this figure, the structure is the functional blocks shown in FIG. 2 from which the hard disk (external storage 14) is removed. This is because the NETFAX 60 need not have a large-capacity storage.

[0114]FIG. 23 shows a network structure to which this embodiment is adapted. As shown in this figure, the NETFAX 60 is located on the LAN 26 and the WWW server 61 is located on a LAN 62. The WWW server 61 is located outside the fire wall provided at the entrance of the LAN 26 as viewed from the reception terminal 3.

[0115] If the LAN 26 on which the NETFAX 60 is located can be accessed directly by the reception terminal 3, the WWW server 61 may be placed on the LAN 26.

[0116]FIG. 24 is a flowchart for registering image data in the WWW server 61 provided on the network. When the NETFAX 60 identifies the e-mail address of the reception terminal 3 which has been input through the panel section 15 by an operator (St 61), the scanner section 16 scans the transmission original to convert it to image data (St 62) and the image data is registered in the form of an HTML document in the WWW server 61 on the network (St 63). Meanwhile, a URL for accessing the image data registered in the WWW server 61 is generated and sent by e-mail to the reception terminal 3 (St 64).

[0117] The reception terminal 3 receives the e-mail. The WWW server 61 is accessed by the HTTP using the URL in the e-mail for the acquisition of the image data without going through the reception site.

[0118] As discussed above, providing the host on the network with the server eliminates the need for a large-capacity storage in the NETFAX 60, so that the structure of the NETFAX 60 can be simplified.

Eighth Embodiment

[0119] In the same system structure as that of the seventh embodiment, a program which can accomplish display, modification, deletion, etc. of image data is attached to image data to be registered in the WWW server 61 and is registered together.

[0120]FIG. 25 is a flowchart up to the transmission of an e-mail for informing image data to the reception terminal 3. When the NETFAX 60 identifies the e-mail address of the reception terminal 3 which has been input through the panel section 15 by an operator (St 71), the scanner section 16 scans the transmission original to convert it to image data (St 72) and the image data is registered in the form of an HTML document in the WWW server 61 on the network (St 73). At this time, the program which handles the image data is affixed to the HTML document of the image data. Meanwhile, a URL for accessing the image data registered in the WWW server 61 is generated and sent by e-mail to the reception terminal 3 (St 74).

[0121] The reception terminal 3 receives the e-mail. The WWW server 61 is accessed by the HTTP using the URL in the e-mail for the acquisition of the program, which handles the image data, together with the image data.

[0122] At the reception terminal 3, as this program is invoked and is used together with the received image data, the image data can be displayed, modified and erased even if the reception terminal 3 does not have the function of processing image data. For example, the reception terminal 3 which does not have a viewer function can display image data saved in the WWW server 61.

[0123] It is to be noted that when access by the reception terminal 3 is detected in the WWW server 61, the program may be invoked on the server to erase data from the server 61 storing that data, or display the data in enlargement, or allow a password to be input.

[0124] Further, the same advantages can be obtained by providing the WWW server 61, located on the network, with the file deleting function, user authentication function and transmission accomplishment informing function, which have been explained in the above-described second to sixth embodiments, singularly or in any combination.

[0125] Although the foregoing description has been given mainly with reference to the case where the transmission original is scanned by the NETFAX 1 or 60 and the e-mail address is input through the panel section 15 by an operator, it may be likewise applied to the case where the NETFAX 1 or 60 relays image data, received from the public telecommunication network, to the reception terminal 3. In this case, the e-mail address of the transmission destination can be designated by the subaddress of the ISDN line.

Ninth Embodiment

[0126]FIG. 26 shows the functional blocks of an information processing terminal which is used as the reception terminal 3 in the above-described first to eighth embodiments. It comprises a CPU 71 which controls the apparatus, a ROM 72 where a program is stored, a RAM 73 which is used for data for the program, a printer section 74 which prints received image data, and an LAN controller 75 which executes data transmission and reception via a network.

[0127]FIG. 27 is a flowchart for acquiring image data from the NETFAX 1 or the WWW server 61. First, an e-mail is received from the sender (St 81). A URL indicative of the location of the content of image data is identified in the received e-mail (St 82). Using this URL and according to the HTTP, the NETFAX 1 or the WWW server 61 which has the target image data is accessed and image data is received from there (St 83). Thereafter, it is printed by the printer section 74 to acquire the intended original.

[0128]FIG. 28 shows functional blocks when the reception terminal 3 is a NETFAX. It comprises a panel section 81 for inputting a telephone number or the like, and a scanner section 82 which scans a transmission original.

[0129] Although the foregoing description has been given of the transmission of image data in facsimile communications, this invention is not limited to facsimile communications. It is also adapted to the transmission of data with a large data size, such as a moving picture, audio information or large-capacity text data.

[0130] In the network structure illustrated in FIG. 5, audio information or moving picture information saved on a hard disk of an information processing terminal which belongs to the LAN 26 is transmitted to a single or a plurality of information processing terminals via the LAN 26 or the Internet 28.

[0131] When there is generated audio information, moving picture information or still picture information to be transmitted from an information processing terminal which becomes a transmission node to another information processing terminal which becomes a reception node, the audio information, moving picture information or still picture information is saved in the storage of the information processing terminal which becomes the transmission node or in the storage on the network, and a URL for access to the data in the storage is prepared and sent by e-mail to the e-mail address of another information processing terminal which becomes the reception node.

[0132] When the data put on an electronic bulletin board on a company LAN has a large size, the data is saved on the hard disk of a server located on the LAN and a URL for accessing data saved in the server is transmitted by e-mail to multiple clients on the LAN. In this case, the data is registered in the server and the terminal which executes multi-casting of the URL becomes the transmission node and the clients become the reception nodes.

INDUSTRIAL APPLICABILITY

[0133] This invention is a data communication method suitable for transmitting still pictures, moving pictures, sounds or text data, which is too large to transmit by e-mail via a network. 

1. A facsimile communication method for transmitting facsimile data to a reception terminal from a facsimile machine via a communication network, a transmission process in said facsimile machine including the steps of: (a) saving image data of an original to be transmitted as facsimile data in a storage; (b) generating access information data for access to said image data, saved in said storage, from said reception terminal via said communication network; (c) sending said access information data to said reception terminal by an e-mail; and (d) transmitting said image data in said storage to said reception terminal from said facsimile machine by a communication protocol of a point-to-point data transfer form upon reception of an access request for said image data from said reception terminal.
 2. The facsimile communication method according to claim 1, wherein a reception process in said reception terminal includes the steps of: (e) receiving said e-mail including said access information data; (f) connecting to said facsimile machine via said communication network in accordance with said access information data in said received e-mail and sending an access request for said image data saved in said storage; and (g) receiving image data sent from said facsimile machine by a point-to-point data transfer form.
 3. A facsimile communication method for transmitting facsimile data to a reception terminal from a facsimile machine via a communication network, a transmission process in said facsimile machine including the steps of: (a) saving image data of an original to be transmitted as facsimile data in a server located on a network; (b) generating access information data for access to said image data, saved in said server, from said reception terminal via said transmission network; and (c) sending said access information data to said reception terminal by an e-mail; and a process in said server including the steps of: (d) saving said image data received from said facsimile machine; and (e) transmitting said image data to said reception terminal by a communication protocol of a point-to-point data transfer form upon reception of an access request for said image data from said reception terminal.
 4. The facsimile communication method according to claim 3, wherein a reception process at said reception terminal includes the steps of: (f) receiving said e-mail including said access information data; (g) connecting to said server via said communication network in accordance with said access information data in said received e-mail and sending an access request for said image data; and (h) receiving image data sent from said server by a point-to-point data transfer form.
 5. A facsimile machine for transmitting facsimile data via a communication network comprising: means for acquiring an e-mail address of a reception terminal, destined for said facsimile data; a storage for saving image data of an original to be transmitted as facsimile data; means for generating access information data for access to said image data, saved in said storage, from said reception terminal via said communication network; means for sending said access information data to said e-mail address of said reception terminal by an e-mail; and means for transmitting said image data in said storage to said reception terminal by a communication protocol of a point-to-point data transfer form upon reception of an access request for said image data from said reception terminal.
 6. The facsimile machine according to claim 5, comprising: means for recognizing access to said image data, saved in said storage, from said reception terminal via said communication network; and means for deleting said accessed image data from said storage.
 7. The facsimile machine according to claim 5, comprising: means for measuring an elapsed time since saving of said image data in said storage; and means for deleting said image data from said storage after said elapsed time exceeds a predetermined time.
 8. The facsimile machine according to claim 5, comprising: means for checking if a reception terminal which has made an access request for said image data saved in said storage has an access right; and means for permitting said reception terminal, which has been recognized to have an access right, to access said image data.
 9. The facsimile machine according to claim 5, comprising: means for making multi-casting of an e-mail including said access information data to a plurality of reception terminals; and means for deleting said image data saved in said storage when confirming that all reception terminals to which multi-casting of said e-mail has been made have accessed said image data.
 10. The facsimile machine according to claim 9, comprising: means for saving an access confirmation column provided with check fields associated with all reception terminals to which multi-casting of said e-mail is to be made, in association with said image data; and means for, when there is access to an image, saved in said storage, from said reception terminal, setting data indicative of access accomplishment in said check field of said access-made reception terminal.
 11. The facsimile machine according to claim 5, comprising: means for adding image reception information data, which is sent back via said communication network to said facsimile machine from said reception terminal having receiving said image data, and access information data for accessing said facsimile machine from said reception terminal via said communication network at a time said image reception information data is sent back to said facsimile machine, to said image data saved in said storage; and means for confirming that said reception device has received said image data by identifying said image reception information data sent back from said reception terminal based on said access information data.
 12. The facsimile machine according to claim 5, comprising: means for acquiring an e-mail address of an acknowledgement requesting device, which is requesting acknowledgement of accomplishment of transmission of said image data, on said communication network; and means for sending an e-mail whose content indicates transmission accomplishment to said e-mail address of said acknowledgement requesting device when transmission of said image data to said reception terminal is accomplished.
 13. The facsimile machine according to claim 5, comprising: means for acquiring an e-mail address of an acknowledgement requesting device, which is requesting acknowledgement of accomplishment of transmission of said image data, on said communication network; means for adding image reception information data, which is sent back via said communication network to said facsimile machine from said reception terminal having receiving said image data, and access information data for accessing said facsimile machine from said reception terminal via said communication network at a time said image reception information data is sent back to said facsimile machine, to said image data saved in said storage; means for confirming that said reception device has received said image data by identifying said image reception information data sent back from said reception terminal based on said access information data; and means for sending an e-mail whose content indicates transmission accomplishment to said e-mail address of said acknowledgement requesting device when confirming that said reception device has received said image data.
 14. The facsimile machine according to claim 5, wherein a program for handling image data is affixed to said image data saved in said storage.
 15. The facsimile machine according to claim 5, wherein said e-mail address of said reception terminal is acquired from address information input by a panel operation by an operator.
 16. The facsimile machine according to claim 15, comprising: means for reading a transmission original and converting said transmission original to image data; and means for converting said read image data to a data format which matches with said communication protocol.
 17. The facsimile machine according to claim 16, wherein access information data including a protocol for access to said image data in said storage, a host name on said communication network of said facsimile machine and a name of a file having said image data saved therein is generated.
 18. The facsimile machine according to claim 5, wherein said e-mail address of said reception terminal is acquired from address information sent together with image data of facsimile data from a public telecommunication network.
 19. The facsimile machine according to claim 18, wherein said image data sent via said public telecommunication network is converted to a data format which matches with said communication protocol.
 20. The facsimile machine according to claim 18, wherein access information data including a protocol for access to said image data in said storage, a host name on said communication network of said facsimile machine and a name of a file having said image data saved therein is generated.
 21. A facsimile machine for transmitting facsimile data via a communication network comprising: means for acquiring an e-mail address of a reception terminal on said communication network; means for registering image data of an original to be transmitted as facsimile data in a server located on said communication network; means for generating access information data for access to said image data, registered in said server, from said reception terminal via said communication network; and means for sending said access information data to said e-mail address of said reception terminal by an e-mail, said server for receiving an access request sent out from said reception terminal and transmitting said image data to said reception terminal by a communication protocol of a point-to-point data transfer form.
 22. The facsimile machine according to claim 21, wherein said server comprises: means for recognizing access to said image data, registered in said server, from said reception terminal via said communication network; and means for deleting said accessed image data from said server.
 23. The facsimile machine according to claim 21, wherein said server comprises: means for measuring an elapsed time since saving of said image data in said server; and means for deleting said image data from said server after said elapsed time exceeds a predetermined time.
 24. The facsimile machine according to claim 21, wherein said server comprises: means for identifying an access right of a reception terminal which has made an access request for said image data registered in said server; and means for permitting said reception terminal, which has been recognized to have an access right, to access said image data.
 25. The facsimile machine according to claim 21, comprising: means for making multi-casting of an e-mail including said access information data to a plurality of reception terminals; and wherein said server has means for deleting said image data saved in said server when confirming that all reception terminals to which multi-casting of said e-mail has been made have accessed said image data.
 26. The facsimile machine according to claim 25, comprising: means for adding an access confirmation column provided with check fields associated with all reception terminals to which multi-casting of said e-mail is to be made, to image data to be registered in said server; and wherein said server has means for, when there is access to an image, saved in said storages from said reception terminal, setting data indicative of access accomplishment in said check field of said access-made reception terminal.
 27. The facsimile machine according to claim 21, comprising: means for adding image reception information data, which is sent back via said communication network to said facsimile machine from said reception terminal having receiving said image data, and access information data for accessing said facsimile machine from said reception terminal via said communication network at a time said image reception information data is sent back to said facsimile machine, to said image data to be registered in said server; and means for confirming that said reception device has received said image data by identifying said image reception information data sent back from said reception terminal based on said access information data.
 28. The facsimile machine according to claim 21, comprising: means for acquiring an e-mail address of an acknowledgement requesting device, which is requesting acknowledgement of accomplishment of transmission of said image data, on said communication network; and means for sending an e-mail whose content indicates transmission accomplishment to said e-mail address of said acknowledgement requesting device when transmission of said image data to said reception terminal from said server is accomplished.
 29. The facsimile machine according to claim 21, comprising: means for adding image reception information data, which is sent back via said communication network to said facsimile machine from said reception terminal having receiving said image data, and access information data for accessing said facsimile machine from said reception terminal via said communication network at a time said image reception information data is sent back to said facsimile machine, to said image data to be registered in said server; means for acquiring an e-mail address of an acknowledgement requesting device, which is requesting acknowledgement of accomplishment of transmission of said image data, on said communication network; means for confirming that said reception device has received said image data by identifying said image reception information data sent back from said reception terminal based on said access information data; and means for sending an e-mail whose content indicates transmission accomplishment to said e-mail address of said acknowledgement requesting device when confirming that said reception device has received said image data.
 30. The facsimile machine according to claim 21, wherein a program for handling image data is affixed to said image data saved in said server.
 31. An information processing terminal for receiving facsimile data sent via a communication network, comprising: means for receiving an e-mail; means for identifying an address of a server having facsimile data saved therein on said communication network and a storage location from access information data included in said received e-mail; and means for connecting to said server at said address and acquiring facsimile data from said storage location.
 32. A data communication method for transmitting data to a reception node from a transmission node, a transmission process in said transmission node including the steps of: (a) acquiring an e-mail address of said reception node; (b) saving data to be transmitted to said reception node in a storage; (c) generating access information data for access to said data, saved in said storage, from said reception node via said transmission network; (d) sending said access information data to said reception node by an e-mail; and (e) transmitting said data to said reception node from said transmission node by a communication protocol of a point-to-point data transfer form upon reception of an access request for said data, saved in said storage, from said reception node.
 33. A data communication method for transmitting data to a reception node from a transmission node, a transmission process in said transmission node including the steps of: (a) acquiring an e-mail address of said reception node; (b) saving data to be transmitted to said reception node in a server located on a network; (c) generating access information data for access to said data, saved in said server, from said reception node via said transmission network; and (d) sending said access information data to said reception node by an e-mail; a process in said server including the steps of: (d) saving said data received from said transmission node; and (e) transmitting said data to said reception node by a communication protocol of a point-to-point data transfer form upon reception of an access request for said data from said reception node. 